I also have a James Oswall possibly Oswalt that died in 1862 and I believe this is the family name as recorder in
"Columbus, Geo., from Its Selection as a "trading Town" in 1827, to Its Partial Destruction by Wilson's Raid, in 1865 : History - Incident - Personality" http://books.google.com/books?id=YPQxAQAAMAAJ&dq=columbus+ga+1827&source=gbs_navlinks_s
Joeseph Oswall is mentioned on page 173 of the same book a died on September 9 1864
I believe there is some error because Lowalt is not listed here.
On Further search Oswalt seems to be the name found in the Columbus Enquirer and Find A Grave. I need to go to the State Archives and look at the records again.